In some cases, just one of these MWs is obtained in a week. On the other hand, by using GPC the different averages of MW can be obtained in about 2 h.
The MW averages Mn, Mw, Mz, Mz+1, and Mv, are mathematically defined in Section 1.5 of Chapter 1. For any MWD, the various average MWs always rank in the order Mn < Mv < Mw < Mz < Mz+1. If all the average MWs are the same, then we have a monodisperse polymer. Mn and Mw are the most commonly used average MWs; in industry, it is usually enough (although not always) to
In some cases, just one of these MWs is obtained in a week. On the other hand, by using GPC the different averages of MW can be obtained in about 2 h.The MW averages Mn, Mw, Mz, Mz+1, and Mv, are mathematically defined in Section 1.5 of Chapter 1. For any MWD, the various average MWs always rank in the order Mn < Mv < Mw < Mz < Mz+1. If all the average MWs are the same, then we have a monodisperse polymer. Mn and Mw are the most commonly used average MWs; in industry, it is usually enough (although not always) to
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